Pet experts will tell you that dogs need a space of their own to snuggle up and sleep in. Canines curl up in a ball in the wild to retain warmth, an instinct that carries over to our suburban pets. So instead of just throwing a dog bed on the floor, why not carve out a space to satisfy your pet’s denning instinct? As den animals, dogs need a “sanctuary that is just large enough for them to fit inside and feel secure,” the American Humane Association says.